Loading...

Estimation of practical Inter-Modulation Rejection values in a multi-loop feed-forward microwave power amplifier using Monte-Carlo method

Mohammad, A ; Sharif University of Technology | 2007

641 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/ICTMICC.2007.4448561
  3. Publisher: 2007
  4. Abstract:
  5. Feed-forward is one of the best methods for linearizing microwave power amplifiers, but due to device tolerance in implementation of the system components, the practical Inter-Modulation Rejection (IMR) value may differ quite much from the theoretical IMR value. One of the methods to improve the practical performance of the system is using the multi-loop configuration. Here we have introduced the multi-loop feedforward systems and we have estimated the practical IMR values of the system using Monte-Carlo analysis. As the analysis shows, although the number of components in a multi-loop system is increased with respect to a simple feed-forward system, but the difference between the practical value and the theoretical value of the IMR for the two systems is almost the same. Therefore a multi-loop feed-forward system with higher practical IMR may be applicable for linearizing a microwave power amplifier. Simulations with ADS show one can expect a multi-loop feedforward system designed for an ideal 39dB IMR, after implementation with usual techniques, may have 29dB rejection, which is an acceptable value for a linearization system. ©2007 IEEE
  6. Keywords:
  7. Amplifiers (electronic) ; Arsenic ; Broadband amplifiers ; Carbon nanotubes ; Estimation ; Intermodulation ; Microwave amplifiers ; Microwave generation ; Microwave power transmission ; Microwaves ; Modulation ; Monte Carlo methods ; Optimal control systems ; Power amplifiers ; Telecommunication systems ; Feed-forward ; Feedforward systems ; Inter-modulation rejection ; International conferences ; Linearization ; Loop configuration ; Malaysia ; Microwave power amplifier ; Microwave power amplifiers ; Microwave powers ; Monte-Carlo analysis ; Multi-loop feed-forward system ; Number of components ; System components ; Transients
  8. Source: 2007 IEEE International Conference on Telecommunications and Malaysia International Conference on Communications, ICT-MICC 2007, Penang, 14 May 2007 through 17 May 2007 ; February , 2007 , Pages 632-637 ; 1424410940 (ISBN); 9781424410941 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/4448561